<?php
echo '<pre>';
// define arrays
$dark = array(
            'a'=>'black',
             1 => 'brown1',
            'b'=> 'brown2',
            'c'=>'blue');
$light = array(
            'a'=>'white',
             1 =>'silver1',
             't'=>'silver2',
             'b'=>'yellow');
$colors = array_merge($dark, $light);
print_r($colors);
